An ovarian cyst will usually only cause symptoms if it splits (ruptures), is very large, or it blocks the blood supply to the ovaries. In these cases, you may have:

-pelvic pain – this can range from a dull, heavy sensation to a sudden, severe and sharp pain
-pain during sex
-difficulty emptying your bowels
-a frequent need to urinate
-heavy periods, irregular periods or lighter periods than normal
-bloating and a swollen tummy
-feeling very full after only eating a little
-difficulty getting pregnant (although fertility is unaffected in most women with ovarian cysts)